问题
选择题
The old couple have three daughters，_____ graduating from the same university.
A．all of them
B．all of whom
C．neither of them
D．neither of whom
答案
答案：A
题目分析:考查独立主格结构。Neither指两者都不，all指三者都，由句中出现的three daughters可以排除C、D选项； graduating 是现在分词不能做谓语，故排除B选项。All of them graduating from the same university是独立主格结构。句意：这对老夫妇有三个女儿，她们都是同一所大学毕业的。